A-2: Arithmetic Calculations
Explore each of the following: 2/3, |-5|, e−3, ln4, log28.
Expression palette: Click on a. Type 2 in the field "a".
Exit the radical with the right-arrow key.
Context Panel: Approximate≻10
23→at 10 digits0.4714045206
Use the vertical stroke character for the absolute-value bars, or click on a in the Expression palette.
Context Panel: Evaluate and Display Inline
−5 = 5
The exponential e
Click on ⅇ in either of the palettes Constants and Symbols, or Common Symbols. Alternatively, type e (in math mode) and using Command Completion (see Table A-1.2), select Exponential 'e'. (See also Table A-2.1.)
Enter the exponential e.
To raise the cursor for the exponent, type ^ (Shift+6).
ⅇ−3→at 10 digits0.04978706837
Type either ln4 or log4 to obtain the natural logarithm.
ln4→at 10 digits1.386294361
log28 = 3
Use the sqrt and evalf commands.
Use the abs command.
Enter the exponential function with the exp command.
Enter the natural logarithm with the ln (or log) command.
Enter log2 with square brackets, as shown to the right.
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